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/**
* OpenAL cross platform audio library
* Copyright (C) 1999-2007 by authors.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
* Or go to http://www.gnu.org/copyleft/lgpl.html
*/
#include "config.h"
#include "threads.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#ifndef UNUSED
#if defined(__cplusplus)
#define UNUSED(x)
#elif defined(__GNUC__)
#define UNUSED(x) UNUSED_##x __attribute__((unused))
#elif defined(__LCLINT__)
#define UNUSED(x) /*@unused@*/ x
#else
#define UNUSED(x) x
#endif
#endif
#define THREAD_STACK_SIZE (2*1024*1024) /* 2MB */
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <mmsystem.h>
void althrd_setname(const char *name)
{
#if defined(_MSC_VER)
#define MS_VC_EXCEPTION 0x406D1388
#pragma pack(push,8)
struct {
DWORD dwType; // Must be 0x1000.
LPCSTR szName; // Pointer to name (in user addr space).
DWORD dwThreadID; // Thread ID (-1=caller thread).
DWORD dwFlags; // Reserved for future use, must be zero.
} info;
#pragma pack(pop)
info.dwType = 0x1000;
info.szName = name;
info.dwThreadID = -1;
info.dwFlags = 0;
__try {
RaiseException(MS_VC_EXCEPTION, 0, sizeof(info)/sizeof(ULONG_PTR), (ULONG_PTR*)&info);
}
__except(EXCEPTION_CONTINUE_EXECUTION) {
}
#undef MS_VC_EXCEPTION
#else
(void)name;
#endif
}
int alsem_init(alsem_t *sem, unsigned int initial)
{
*sem = CreateSemaphore(NULL, initial, INT_MAX, NULL);
if(*sem != NULL) return althrd_success;
return althrd_error;
}
void alsem_destroy(alsem_t *sem)
{
CloseHandle(*sem);
}
int alsem_post(alsem_t *sem)
{
DWORD ret = ReleaseSemaphore(*sem, 1, NULL);
if(ret) return althrd_success;
return althrd_error;
}
int alsem_wait(alsem_t *sem)
{
DWORD ret = WaitForSingleObject(*sem, INFINITE);
if(ret == WAIT_OBJECT_0) return althrd_success;
return althrd_error;
}
int alsem_trywait(alsem_t *sem)
{
DWORD ret = WaitForSingleObject(*sem, 0);
if(ret == WAIT_OBJECT_0) return althrd_success;
if(ret == WAIT_TIMEOUT) return althrd_busy;
return althrd_error;
}
#else
#include <sys/time.h>
#include <unistd.h>
#include <pthread.h>
#ifdef HAVE_PTHREAD_NP_H
#include <pthread_np.h>
#endif
void althrd_setname(const char *name)
{
#if defined(HAVE_PTHREAD_SETNAME_NP)
#if defined(PTHREAD_SETNAME_NP_ONE_PARAM)
pthread_setname_np(name);
#elif defined(PTHREAD_SETNAME_NP_THREE_PARAMS)
pthread_setname_np(pthread_self(), "%s", (void*)name);
#else
pthread_setname_np(pthread_self(), name);
#endif
#elif defined(HAVE_PTHREAD_SET_NAME_NP)
pthread_set_name_np(pthread_self(), name);
#else
(void)name;
#endif
}
#ifdef __APPLE__
int alsem_init(alsem_t *sem, unsigned int initial)
{
*sem = dispatch_semaphore_create(initial);
return *sem ? althrd_success : althrd_error;
}
void alsem_destroy(alsem_t *sem)
{
dispatch_release(*sem);
}
int alsem_post(alsem_t *sem)
{
dispatch_semaphore_signal(*sem);
return althrd_success;
}
int alsem_wait(alsem_t *sem)
{
dispatch_semaphore_wait(*sem, DISPATCH_TIME_FOREVER);
return althrd_success;
}
int alsem_trywait(alsem_t *sem)
{
long value = dispatch_semaphore_wait(*sem, DISPATCH_TIME_NOW);
return value == 0 ? althrd_success : althrd_busy;
}
#else /* !__APPLE__ */
int alsem_init(alsem_t *sem, unsigned int initial)
{
if(sem_init(sem, 0, initial) == 0)
return althrd_success;
return althrd_error;
}
void alsem_destroy(alsem_t *sem)
{
sem_destroy(sem);
}
int alsem_post(alsem_t *sem)
{
if(sem_post(sem) == 0)
return althrd_success;
return althrd_error;
}
int alsem_wait(alsem_t *sem)
{
if(sem_wait(sem) == 0) return althrd_success;
if(errno == EINTR) return -2;
return althrd_error;
}
int alsem_trywait(alsem_t *sem)
{
if(sem_trywait(sem) == 0) return althrd_success;
if(errno == EWOULDBLOCK) return althrd_busy;
if(errno == EINTR) return -2;
return althrd_error;
}
#endif /* __APPLE__ */
#endif
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